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forward modeling

The technique of determining what a given sensor would measure in a given formation and environment by applying a set of theoretical equations for the sensor response. Forward modeling is used to determine the general response of most electromagnetic logging measurements, unlike nuclear measurements whose response is determined mainly in laboratory experiments. Forward modeling is also used for interpretation, particularly in horizontal wells and complex environments. In this case, iterative forward modeling is used. The set of theoretical equations (the forward models) can be 1D, 2D or 3D. The more complex the geometry, the more factors can be modeled but the slower the computing time.